Prime Minister Narendra Modi has expressed condolences over the passing away of former Prime Minister Atal Bihari Vajpayee's long-time aide, Shiv Kumar Pareek. In a tweet, Mr. Modi said, firmly rooted in BJP's ideology, he devoted himself to service, nation-building and worked closely with Atal Ji. The Prime Minister said he will cherish his interactions with him over the years. <br />''<br />''<br />''<br />